Spangler etal	def. pub.
polymerization reactor for spandex polymers



T gi 06% DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JULY 15, 1969 777,421 isolated, individual compartments which separately may POLYMERIZATION RE CTOR OR SPANDEX be intermittently connected to the chambers discharge port POLYMERS Gordon W. Spangler, Charles B. Mather, and William M.

McSpadden, Jr., all of R0. Box 511, Kingsport, Tenn.

Filed Nov. 20, 1968. Published July 15, 1969 Int. Cl. C08g 35/00, 22/04 US. Cl. 23-285 2 Sheets Drawing. 16 Pages Specification for reaction Without back mixing of a reacted portion of the reactant mixture by contact with the non-reacted portion. The compartmented holdup section is designed in the shape of a rotatable gear wherein the teeth form the side walls for the rotatable separate compartments. A divider Apparatus for producing dopes of spandex polymers plate with a single opening forms the end plate for the including a mixing chamber with at least one inlet port separate compartments remote from the high speed mixer and at least one discharge port, mixing means within the inlet. The single opening functions as a discharge directly chamber to rapidly and intimately mix the reactant soluto a fiber spinning machine from the holdup section or tions, and one or more holdup sections downstream of into a second holdup section for secondary treatment as the chamber, each holdup section having a number of determined by the product desired.

July 15, 1969 s. w. SPANGLER ET AL DEF. PUB.

POLYMERIIZATION REACTOR FOR SPANDEX POLYMERS SN 777q2l Filed Nov. 20, 1968 Sheet 1 of 2 Q Gordon W. Spengler Charles 8. Mother William M. McSpuddemJr.

INVENTORS ATTORNEYS July 15, 1969 c. w. SPANGLER ETAL DEF. PUB.

POLYMERIZATION REACTOR FOR SPANDEX POLYMERS SN 777,421

Filed Nov. 20, 1968 Sheet g of 2 Gordon W. Spengler Chqrles B. Mother William M. McSpcdden,Jr.

INVENTORS mm. '1 z? z? 1;

ATTORNEYS 

